A kind of preparation method of magnetic cellulose composite fiber

A technology of composite fibers and cellulose, applied in the field of fibers, can solve the problems of affecting the normal recovery of solvents and coagulants, affecting the physical and chemical properties of fibers, increasing recycling costs, etc., and achieving good functions, method introduction, and health and beauty functions.

Active Publication Date: 2018-11-23
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mixing suspensions, emulsions and cellulose spinning solutions can improve the dispersion uniformity of functional additives, but additives such as surfactants will enter the coagulation bath, affecting the normal recovery of solvents and coagulants, increasing the cost of recovery
The additives remaining in the fiber will also affect the physical and chemical properties of the fiber, and there is also the possibility of additive leakage during use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A preparation method of magnetic cellulose composite fiber includes the following steps:

[0034] The cellulose solvent N-methylmorpholine-N-oxide (NMMO) / water (where water accounts for 13.8% by weight) is used to dissolve cellulose acetate with a degree of polymerization of 200 and a total degree of esterification of 2.3. A carrier solution of cobalt oxide with a cellulose acetate concentration of 6 wt% is obtained; then the cobalt oxide with an average particle diameter of 0.2 μm and the carrier solution are stirred and mixed using a screw extruder, where the stirring rate is 100 rpm, and the stirring time For 0.5 hours, the mass ratio of cellulose acetate to cobalt oxide is 1:1, and the magnetic function mother liquor is prepared; finally, the magnetic function mother liquor is injected into the cellulose spinning solution with a polymerization degree of 500 and a concentration of 6wt% by way of online addition. Specifically, the cellulose spinning solution delivery pip...

Embodiment 2

[0037] A preparation method of magnetic cellulose composite fiber includes the following steps:

[0038] The cellulose solvent N-methylmorpholine-N-oxide (NMMO) / water (where water accounts for 13.4wt%) is used to dissolve cellulose acetate propionate with a polymerization degree of 1000 and a total esterification degree of 2.5 , The carrier solution of ferroferric oxide with a cellulose acetate propionate concentration of 15wt% was prepared; then ferroferric oxide with an average particle size of 0.38μm was mixed with the carrier solution using a kneader, and the stirring rate was 300 rpm / Min, the stirring time is 1 hour, the mass ratio of cellulose acetate propionate to ferroferric oxide is 9:1, to prepare the magnetic function mother liquor; finally, the magnetic function mother liquor is injected into the polymerization degree of 1500 by way of online addition. In the cellulose spinning solution with a concentration of 15% by weight, the cellulose spinning solution delivery p...

Embodiment 3

[0041] A preparation method of magnetic cellulose composite fiber includes the following steps:

[0042] Using the cellulose solvent 1-butyl-3-methylimidazole chloride salt to dissolve cellulose acetate butyrate with a degree of polymerization of 300 and a total degree of esterification of 2.4 to prepare trioxide with a cellulose acetate butyrate concentration of 7wt% The carrier solution of iron; then the ferroferric oxide with an average particle size of 0.39μm and the carrier solution are stirred and mixed by a screw extruder, where the stirring rate is 200 rpm, and the stirring time is 0.6 hours. Acetate butyrate fiber The mass ratio of iron to ferroferric oxide is 10:1, and the magnetic function mother liquid is prepared; finally, the magnetic function mother liquid is injected into the cellulose spinning liquid with a degree of polymerization of 600 and a concentration of 8wt% by online addition, specifically The cellulose spinning solution delivery pipeline on the producti...

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Abstract

The invention relates to a method for preparing a magnetic cellulose composite fiber. The method comprises dissolving a cellulose ester by a cellulose solvent to obtain a carrier solution of magnetic powder, mixing the magnetic powder and the carrier solution by a strong shearing force provided by a stirring device to obtain a magnetic functional mother liquor, injecting a cellulose spinning solution into the magnetic functional mother liquor in the form of on-line addition, and carrying out spinning solution extrusion, solidification, drafting and magnetization to obtain the magnetic cellulose composite fibers. In order to solve the problem that the magnetic powder is difficult to be uniformly mixed with the high-viscosity spinning solution, the cellulose spinning solution is injected into the magnetic functional mother liquor and then the magnetic cellulose composite fibers are prepared through spinning. The mother liquor carrier is molded along with fiber solidification and additional adjuvants do not enter the solvent and coagulation bath system. The forming method of the invention is simple, flexible and efficient, and can realize magnetic cellulose composite fiber production based on a conventional production line.

Description

Technical field [0001] The invention relates to the field of fibers, in particular to a method for preparing magnetic cellulose composite fibers. Background technique [0002] Regenerated cellulose fibers such as viscose fiber and Lyocell fiber are chemical fibers formed by wet spinning or dry jet wet spinning with natural cellulose as raw material. Regenerated cellulose is widely used in fields such as clothing, medical treatment, and industrial fabrics. With the development of regenerated cellulose fiber production technology, functional regenerated cellulose fibers have attracted attention, and magnetic cellulose fiber is one of them. Sun et al. (Magnetite-embedded cellulose fibers prepared from ionic liquid[J].Journal of Materials Chemistry,2008,18(3):283-290.) will Fe 3 O 4 The powder was mixed with cellulose / ionic liquid solution, and the magnetic cellulose fiber was prepared by dry-jet wet spinning. [0003] Will Fe 3 O 4 The mixing uniformity of magnetic powder such as po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/02D01F1/10
CPCD01F1/10D01F8/02
Inventor 王华平张玉梅李建武陈康郝明
Owner DONGHUA UNIV
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